Temporarily remove the buddy allocator and related selftests and hook up the TTM range manager for i915 regions.
Also modify the mock region selftests somewhat to account for a fragmenting manager.
Signed-off-by: Thomas Hellström thomas.hellstrom@linux.intel.com Reviewed-by: Matthew Auld matthew.auld@intel.com #v2 --- v2: - Fix an error unwind in lmem_get_pages() (Reported by Matthew Auld) - Break out and modify usage of i915_sg_dma_sizes() (Reported by Mattew Auld) - Break out TTM changes to a separate patch (Reported by Christian König) v3: - Fix the same error unwind in mock_region_get_pages() (Reported by Matthew Auld) - Don't rely on new TTM functionality, but create a mock TTM device, (Reported by Christian König) v4: - Use mock_gem_device rather than creating a separate ttm_device per region. --- drivers/gpu/drm/i915/Kconfig | 1 + drivers/gpu/drm/i915/Makefile | 2 +- drivers/gpu/drm/i915/gem/i915_gem_lmem.c | 59 +- .../gpu/drm/i915/gem/i915_gem_object_types.h | 6 +- drivers/gpu/drm/i915/gem/i915_gem_pages.c | 3 +- drivers/gpu/drm/i915/gem/i915_gem_region.c | 120 --- drivers/gpu/drm/i915/gem/i915_gem_region.h | 4 - drivers/gpu/drm/i915/gem/i915_gem_shmem.c | 4 +- drivers/gpu/drm/i915/gem/i915_gem_stolen.c | 10 +- drivers/gpu/drm/i915/gem/i915_gem_stolen.h | 9 +- drivers/gpu/drm/i915/gt/intel_gt.c | 2 - drivers/gpu/drm/i915/gt/intel_region_lmem.c | 27 +- drivers/gpu/drm/i915/i915_buddy.c | 435 ---------- drivers/gpu/drm/i915/i915_buddy.h | 131 --- drivers/gpu/drm/i915/i915_drv.c | 8 + drivers/gpu/drm/i915/i915_drv.h | 8 +- drivers/gpu/drm/i915/i915_gem.c | 1 + drivers/gpu/drm/i915/i915_globals.c | 1 - drivers/gpu/drm/i915/i915_globals.h | 1 - drivers/gpu/drm/i915/i915_scatterlist.c | 70 ++ drivers/gpu/drm/i915/i915_scatterlist.h | 4 + drivers/gpu/drm/i915/intel_memory_region.c | 180 ++-- drivers/gpu/drm/i915/intel_memory_region.h | 44 +- drivers/gpu/drm/i915/intel_region_ttm.c | 220 +++++ drivers/gpu/drm/i915/intel_region_ttm.h | 32 + drivers/gpu/drm/i915/selftests/i915_buddy.c | 789 ------------------ .../drm/i915/selftests/i915_mock_selftests.h | 1 - .../drm/i915/selftests/intel_memory_region.c | 133 +-- .../gpu/drm/i915/selftests/mock_gem_device.c | 10 + drivers/gpu/drm/i915/selftests/mock_region.c | 70 +- 30 files changed, 631 insertions(+), 1754 deletions(-) delete mode 100644 drivers/gpu/drm/i915/i915_buddy.c delete mode 100644 drivers/gpu/drm/i915/i915_buddy.h create mode 100644 drivers/gpu/drm/i915/intel_region_ttm.c create mode 100644 drivers/gpu/drm/i915/intel_region_ttm.h delete mode 100644 drivers/gpu/drm/i915/selftests/i915_buddy.c
diff --git a/drivers/gpu/drm/i915/Kconfig b/drivers/gpu/drm/i915/Kconfig index 93f4d059fc89..61ff5c178714 100644 --- a/drivers/gpu/drm/i915/Kconfig +++ b/drivers/gpu/drm/i915/Kconfig @@ -27,6 +27,7 @@ config DRM_I915 select SND_HDA_I915 if SND_HDA_CORE select CEC_CORE if CEC_NOTIFIER select VMAP_PFN + select DRM_TTM help Choose this option if you have a system that has "Intel Graphics Media Accelerator" or "HD Graphics" integrated graphics, diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile index 6947495bf34b..4f22cac1c49b 100644 --- a/drivers/gpu/drm/i915/Makefile +++ b/drivers/gpu/drm/i915/Makefile @@ -50,6 +50,7 @@ i915-y += i915_drv.o \ intel_memory_region.o \ intel_pch.o \ intel_pm.o \ + intel_region_ttm.o \ intel_runtime_pm.o \ intel_sideband.o \ intel_step.o \ @@ -160,7 +161,6 @@ gem-y += \ i915-y += \ $(gem-y) \ i915_active.o \ - i915_buddy.o \ i915_cmd_parser.o \ i915_gem_evict.o \ i915_gem_gtt.o \ diff --git a/drivers/gpu/drm/i915/gem/i915_gem_lmem.c b/drivers/gpu/drm/i915/gem/i915_gem_lmem.c index f44bdd08f7cb..3b4aa28a076d 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_lmem.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_lmem.c @@ -4,16 +4,71 @@ */
#include "intel_memory_region.h" +#include "intel_region_ttm.h" #include "gem/i915_gem_region.h" #include "gem/i915_gem_lmem.h" #include "i915_drv.h"
+static void lmem_put_pages(struct drm_i915_gem_object *obj, + struct sg_table *pages) +{ + intel_region_ttm_node_free(obj->mm.region, obj->mm.st_mm_node); + obj->mm.dirty = false; + sg_free_table(pages); + kfree(pages); +} + +static int lmem_get_pages(struct drm_i915_gem_object *obj) +{ + unsigned int flags; + struct sg_table *pages; + + flags = I915_ALLOC_MIN_PAGE_SIZE; + if (obj->flags & I915_BO_ALLOC_CONTIGUOUS) + flags |= I915_ALLOC_CONTIGUOUS; + + obj->mm.st_mm_node = intel_region_ttm_node_alloc(obj->mm.region, + obj->base.size, + flags); + if (IS_ERR(obj->mm.st_mm_node)) + return PTR_ERR(obj->mm.st_mm_node); + + /* Range manager is always contigous */ + if (obj->mm.region->is_range_manager) + obj->flags |= I915_BO_ALLOC_CONTIGUOUS; + pages = intel_region_ttm_node_to_st(obj->mm.region, obj->mm.st_mm_node); + if (IS_ERR(pages)) { + intel_region_ttm_node_free(obj->mm.region, obj->mm.st_mm_node); + return PTR_ERR(pages); + } + + __i915_gem_object_set_pages(obj, pages, i915_sg_dma_sizes(pages->sgl)); + + if (obj->flags & I915_BO_ALLOC_CPU_CLEAR) { + void __iomem *vaddr = + i915_gem_object_lmem_io_map(obj, 0, obj->base.size); + + if (!vaddr) { + struct sg_table *pages = + __i915_gem_object_unset_pages(obj); + + if (!IS_ERR_OR_NULL(pages)) + lmem_put_pages(obj, pages); + } + + memset_io(vaddr, 0, obj->base.size); + io_mapping_unmap(vaddr); + } + + return 0; +} + const struct drm_i915_gem_object_ops i915_gem_lmem_obj_ops = { .name = "i915_gem_object_lmem", .flags = I915_GEM_OBJECT_HAS_IOMEM,
- .get_pages = i915_gem_object_get_pages_buddy, - .put_pages = i915_gem_object_put_pages_buddy, + .get_pages = lmem_get_pages, + .put_pages = lmem_put_pages, .release = i915_gem_object_release_memory_region, };
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h index 0415f99b6b95..f5b46d11e6e6 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h @@ -235,10 +235,12 @@ struct drm_i915_gem_object { * Memory region for this object. */ struct intel_memory_region *region; + /** - * List of memory region blocks allocated for this object. + * Memory manager node allocated for this object. */ - struct list_head blocks; + void *st_mm_node; + /** * Element within memory_region->objects or region->purgeable * if the object is marked as DONTNEED. Access is protected by diff --git a/drivers/gpu/drm/i915/gem/i915_gem_pages.c b/drivers/gpu/drm/i915/gem/i915_gem_pages.c index 7361971c177d..6444e097016d 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_pages.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_pages.c @@ -475,7 +475,8 @@ __i915_gem_object_get_sg(struct drm_i915_gem_object *obj,
might_sleep(); GEM_BUG_ON(n >= obj->base.size >> PAGE_SHIFT); - GEM_BUG_ON(!i915_gem_object_has_pinned_pages(obj)); + if (!i915_gem_object_has_pinned_pages(obj)) + assert_object_held(obj);
/* As we iterate forward through the sg, we record each entry in a * radixtree for quick repeated (backwards) lookups. If we have seen diff --git a/drivers/gpu/drm/i915/gem/i915_gem_region.c b/drivers/gpu/drm/i915/gem/i915_gem_region.c index ce8fcfc54079..f25e6646c5b7 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_region.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_region.c @@ -8,129 +8,9 @@ #include "i915_drv.h" #include "i915_trace.h"
-void -i915_gem_object_put_pages_buddy(struct drm_i915_gem_object *obj, - struct sg_table *pages) -{ - __intel_memory_region_put_pages_buddy(obj->mm.region, &obj->mm.blocks); - - obj->mm.dirty = false; - sg_free_table(pages); - kfree(pages); -} - -int -i915_gem_object_get_pages_buddy(struct drm_i915_gem_object *obj) -{ - const u64 max_segment = i915_sg_segment_size(); - struct intel_memory_region *mem = obj->mm.region; - struct list_head *blocks = &obj->mm.blocks; - resource_size_t size = obj->base.size; - resource_size_t prev_end; - struct i915_buddy_block *block; - unsigned int flags; - struct sg_table *st; - struct scatterlist *sg; - unsigned int sg_page_sizes; - int ret; - - st = kmalloc(sizeof(*st), GFP_KERNEL); - if (!st) - return -ENOMEM; - - if (sg_alloc_table(st, size >> PAGE_SHIFT, GFP_KERNEL)) { - kfree(st); - return -ENOMEM; - } - - flags = I915_ALLOC_MIN_PAGE_SIZE; - if (obj->flags & I915_BO_ALLOC_CONTIGUOUS) - flags |= I915_ALLOC_CONTIGUOUS; - - ret = __intel_memory_region_get_pages_buddy(mem, size, flags, blocks); - if (ret) - goto err_free_sg; - - GEM_BUG_ON(list_empty(blocks)); - - sg = st->sgl; - st->nents = 0; - sg_page_sizes = 0; - prev_end = (resource_size_t)-1; - - list_for_each_entry(block, blocks, link) { - u64 block_size, offset; - - block_size = min_t(u64, size, - i915_buddy_block_size(&mem->mm, block)); - offset = i915_buddy_block_offset(block); - - while (block_size) { - u64 len; - - if (offset != prev_end || sg->length >= max_segment) { - if (st->nents) { - sg_page_sizes |= sg->length; - sg = __sg_next(sg); - } - - sg_dma_address(sg) = mem->region.start + offset; - sg_dma_len(sg) = 0; - sg->length = 0; - st->nents++; - } - - len = min(block_size, max_segment - sg->length); - sg->length += len; - sg_dma_len(sg) += len; - - offset += len; - block_size -= len; - - prev_end = offset; - } - } - - sg_page_sizes |= sg->length; - sg_mark_end(sg); - i915_sg_trim(st); - - /* Intended for kernel internal use only */ - if (obj->flags & I915_BO_ALLOC_CPU_CLEAR) { - struct scatterlist *sg; - unsigned long i; - - for_each_sg(st->sgl, sg, st->nents, i) { - unsigned int length; - void __iomem *vaddr; - dma_addr_t daddr; - - daddr = sg_dma_address(sg); - daddr -= mem->region.start; - length = sg_dma_len(sg); - - vaddr = io_mapping_map_wc(&mem->iomap, daddr, length); - memset64((void __force *)vaddr, 0, length / sizeof(u64)); - io_mapping_unmap(vaddr); - } - - wmb(); - } - - __i915_gem_object_set_pages(obj, st, sg_page_sizes); - - return 0; - -err_free_sg: - sg_free_table(st); - kfree(st); - return ret; -} - void i915_gem_object_init_memory_region(struct drm_i915_gem_object *obj, struct intel_memory_region *mem) { - INIT_LIST_HEAD(&obj->mm.blocks); obj->mm.region = intel_memory_region_get(mem);
if (obj->base.size <= mem->min_page_size) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_region.h b/drivers/gpu/drm/i915/gem/i915_gem_region.h index ebddc86d78f7..84fcb3297400 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_region.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_region.h @@ -12,10 +12,6 @@ struct intel_memory_region; struct drm_i915_gem_object; struct sg_table;
-int i915_gem_object_get_pages_buddy(struct drm_i915_gem_object *obj); -void i915_gem_object_put_pages_buddy(struct drm_i915_gem_object *obj, - struct sg_table *pages); - void i915_gem_object_init_memory_region(struct drm_i915_gem_object *obj, struct intel_memory_region *mem); void i915_gem_object_release_memory_region(struct drm_i915_gem_object *obj); diff --git a/drivers/gpu/drm/i915/gem/i915_gem_shmem.c b/drivers/gpu/drm/i915/gem/i915_gem_shmem.c index a9bfa66c8da1..5d16c4462fda 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_shmem.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_shmem.c @@ -628,11 +628,13 @@ static const struct intel_memory_region_ops shmem_region_ops = { .init_object = shmem_object_init, };
-struct intel_memory_region *i915_gem_shmem_setup(struct drm_i915_private *i915) +struct intel_memory_region *i915_gem_shmem_setup(struct drm_i915_private *i915, + u16 type, u16 instance) { return intel_memory_region_create(i915, 0, totalram_pages() << PAGE_SHIFT, PAGE_SIZE, 0, + type, instance, &shmem_region_ops); }
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_stolen.c b/drivers/gpu/drm/i915/gem/i915_gem_stolen.c index b5553fc3ac4d..092d7a21de82 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_stolen.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_stolen.c @@ -772,7 +772,8 @@ static const struct intel_memory_region_ops i915_region_stolen_lmem_ops = { };
struct intel_memory_region * -i915_gem_stolen_lmem_setup(struct drm_i915_private *i915) +i915_gem_stolen_lmem_setup(struct drm_i915_private *i915, u16 type, + u16 instance) { struct intel_uncore *uncore = &i915->uncore; struct pci_dev *pdev = to_pci_dev(i915->drm.dev); @@ -790,6 +791,7 @@ i915_gem_stolen_lmem_setup(struct drm_i915_private *i915)
mem = intel_memory_region_create(i915, lmem_base, lmem_size, I915_GTT_PAGE_SIZE_4K, io_start, + type, instance, &i915_region_stolen_lmem_ops); if (IS_ERR(mem)) return mem; @@ -811,14 +813,15 @@ i915_gem_stolen_lmem_setup(struct drm_i915_private *i915) }
struct intel_memory_region* -i915_gem_stolen_smem_setup(struct drm_i915_private *i915) +i915_gem_stolen_smem_setup(struct drm_i915_private *i915, u16 type, + u16 instance) { struct intel_memory_region *mem;
mem = intel_memory_region_create(i915, intel_graphics_stolen_res.start, resource_size(&intel_graphics_stolen_res), - PAGE_SIZE, 0, + PAGE_SIZE, 0, type, instance, &i915_region_stolen_smem_ops); if (IS_ERR(mem)) return mem; @@ -826,7 +829,6 @@ i915_gem_stolen_smem_setup(struct drm_i915_private *i915) intel_memory_region_set_name(mem, "stolen-system");
mem->private = true; - return mem; }
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_stolen.h b/drivers/gpu/drm/i915/gem/i915_gem_stolen.h index 2bec6c367b9c..ccdf7befc571 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_stolen.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_stolen.h @@ -21,8 +21,13 @@ int i915_gem_stolen_insert_node_in_range(struct drm_i915_private *dev_priv, u64 end); void i915_gem_stolen_remove_node(struct drm_i915_private *dev_priv, struct drm_mm_node *node); -struct intel_memory_region *i915_gem_stolen_smem_setup(struct drm_i915_private *i915); -struct intel_memory_region *i915_gem_stolen_lmem_setup(struct drm_i915_private *i915); +struct intel_memory_region * +i915_gem_stolen_smem_setup(struct drm_i915_private *i915, u16 type, + u16 instance); +struct intel_memory_region * +i915_gem_stolen_lmem_setup(struct drm_i915_private *i915, u16 type, + u16 instance); + struct drm_i915_gem_object * i915_gem_object_create_stolen(struct drm_i915_private *dev_priv, resource_size_t size); diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c index 8d77dcbad059..3f88ecdee031 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt.c +++ b/drivers/gpu/drm/i915/gt/intel_gt.c @@ -68,8 +68,6 @@ int intel_gt_probe_lmem(struct intel_gt *gt) id = INTEL_REGION_LMEM;
mem->id = id; - mem->type = INTEL_MEMORY_LOCAL; - mem->instance = 0;
intel_memory_region_set_name(mem, "local%u", mem->instance);
diff --git a/drivers/gpu/drm/i915/gt/intel_region_lmem.c b/drivers/gpu/drm/i915/gt/intel_region_lmem.c index 73fceb0c25fc..f7366b054f8e 100644 --- a/drivers/gpu/drm/i915/gt/intel_region_lmem.c +++ b/drivers/gpu/drm/i915/gt/intel_region_lmem.c @@ -5,6 +5,8 @@
#include "i915_drv.h" #include "intel_memory_region.h" +#include "intel_region_lmem.h" +#include "intel_region_ttm.h" #include "gem/i915_gem_lmem.h" #include "gem/i915_gem_region.h" #include "intel_region_lmem.h" @@ -66,9 +68,9 @@ static void release_fake_lmem_bar(struct intel_memory_region *mem) static void region_lmem_release(struct intel_memory_region *mem) { - release_fake_lmem_bar(mem); + intel_region_ttm_fini(mem); io_mapping_fini(&mem->iomap); - intel_memory_region_release_buddy(mem); + release_fake_lmem_bar(mem); }
static int @@ -83,12 +85,21 @@ region_lmem_init(struct intel_memory_region *mem)
if (!io_mapping_init_wc(&mem->iomap, mem->io_start, - resource_size(&mem->region))) - return -EIO; + resource_size(&mem->region))) { + ret = -EIO; + goto out_no_io; + }
- ret = intel_memory_region_init_buddy(mem); + ret = intel_region_ttm_init(mem); if (ret) - io_mapping_fini(&mem->iomap); + goto out_no_buddy; + + return 0; + +out_no_buddy: + io_mapping_fini(&mem->iomap); +out_no_io: + release_fake_lmem_bar(mem);
return ret; } @@ -127,6 +138,8 @@ intel_gt_setup_fake_lmem(struct intel_gt *gt) mappable_end, PAGE_SIZE, io_start, + INTEL_MEMORY_LOCAL, + 0, &intel_region_lmem_ops); if (!IS_ERR(mem)) { drm_info(&i915->drm, "Intel graphics fake LMEM: %pR\n", @@ -198,6 +211,8 @@ static struct intel_memory_region *setup_lmem(struct intel_gt *gt) lmem_size, I915_GTT_PAGE_SIZE_4K, io_start, + INTEL_MEMORY_LOCAL, + 0, &intel_region_lmem_ops); if (IS_ERR(mem)) return mem; diff --git a/drivers/gpu/drm/i915/i915_buddy.c b/drivers/gpu/drm/i915/i915_buddy.c deleted file mode 100644 index 3a2f6eecb2fc..000000000000 --- a/drivers/gpu/drm/i915/i915_buddy.c +++ /dev/null @@ -1,435 +0,0 @@ -// SPDX-License-Identifier: MIT -/* - * Copyright © 2019 Intel Corporation - */ - -#include <linux/kmemleak.h> -#include <linux/slab.h> - -#include "i915_buddy.h" - -#include "i915_gem.h" -#include "i915_globals.h" -#include "i915_utils.h" - -static struct i915_global_block { - struct i915_global base; - struct kmem_cache *slab_blocks; -} global; - -static void i915_global_buddy_shrink(void) -{ - kmem_cache_shrink(global.slab_blocks); -} - -static void i915_global_buddy_exit(void) -{ - kmem_cache_destroy(global.slab_blocks); -} - -static struct i915_global_block global = { { - .shrink = i915_global_buddy_shrink, - .exit = i915_global_buddy_exit, -} }; - -int __init i915_global_buddy_init(void) -{ - global.slab_blocks = KMEM_CACHE(i915_buddy_block, SLAB_HWCACHE_ALIGN); - if (!global.slab_blocks) - return -ENOMEM; - - i915_global_register(&global.base); - return 0; -} - -static struct i915_buddy_block *i915_block_alloc(struct i915_buddy_block *parent, - unsigned int order, - u64 offset) -{ - struct i915_buddy_block *block; - - GEM_BUG_ON(order > I915_BUDDY_MAX_ORDER); - - block = kmem_cache_zalloc(global.slab_blocks, GFP_KERNEL); - if (!block) - return NULL; - - block->header = offset; - block->header |= order; - block->parent = parent; - - GEM_BUG_ON(block->header & I915_BUDDY_HEADER_UNUSED); - return block; -} - -static void i915_block_free(struct i915_buddy_block *block) -{ - kmem_cache_free(global.slab_blocks, block); -} - -static void mark_allocated(struct i915_buddy_block *block) -{ - block->header &= ~I915_BUDDY_HEADER_STATE; - block->header |= I915_BUDDY_ALLOCATED; - - list_del(&block->link); -} - -static void mark_free(struct i915_buddy_mm *mm, - struct i915_buddy_block *block) -{ - block->header &= ~I915_BUDDY_HEADER_STATE; - block->header |= I915_BUDDY_FREE; - - list_add(&block->link, - &mm->free_list[i915_buddy_block_order(block)]); -} - -static void mark_split(struct i915_buddy_block *block) -{ - block->header &= ~I915_BUDDY_HEADER_STATE; - block->header |= I915_BUDDY_SPLIT; - - list_del(&block->link); -} - -int i915_buddy_init(struct i915_buddy_mm *mm, u64 size, u64 chunk_size) -{ - unsigned int i; - u64 offset; - - if (size < chunk_size) - return -EINVAL; - - if (chunk_size < PAGE_SIZE) - return -EINVAL; - - if (!is_power_of_2(chunk_size)) - return -EINVAL; - - size = round_down(size, chunk_size); - - mm->size = size; - mm->chunk_size = chunk_size; - mm->max_order = ilog2(size) - ilog2(chunk_size); - - GEM_BUG_ON(mm->max_order > I915_BUDDY_MAX_ORDER); - - mm->free_list = kmalloc_array(mm->max_order + 1, - sizeof(struct list_head), - GFP_KERNEL); - if (!mm->free_list) - return -ENOMEM; - - for (i = 0; i <= mm->max_order; ++i) - INIT_LIST_HEAD(&mm->free_list[i]); - - mm->n_roots = hweight64(size); - - mm->roots = kmalloc_array(mm->n_roots, - sizeof(struct i915_buddy_block *), - GFP_KERNEL); - if (!mm->roots) - goto out_free_list; - - offset = 0; - i = 0; - - /* - * Split into power-of-two blocks, in case we are given a size that is - * not itself a power-of-two. - */ - do { - struct i915_buddy_block *root; - unsigned int order; - u64 root_size; - - root_size = rounddown_pow_of_two(size); - order = ilog2(root_size) - ilog2(chunk_size); - - root = i915_block_alloc(NULL, order, offset); - if (!root) - goto out_free_roots; - - mark_free(mm, root); - - GEM_BUG_ON(i > mm->max_order); - GEM_BUG_ON(i915_buddy_block_size(mm, root) < chunk_size); - - mm->roots[i] = root; - - offset += root_size; - size -= root_size; - i++; - } while (size); - - return 0; - -out_free_roots: - while (i--) - i915_block_free(mm->roots[i]); - kfree(mm->roots); -out_free_list: - kfree(mm->free_list); - return -ENOMEM; -} - -void i915_buddy_fini(struct i915_buddy_mm *mm) -{ - int i; - - for (i = 0; i < mm->n_roots; ++i) { - GEM_WARN_ON(!i915_buddy_block_is_free(mm->roots[i])); - i915_block_free(mm->roots[i]); - } - - kfree(mm->roots); - kfree(mm->free_list); -} - -static int split_block(struct i915_buddy_mm *mm, - struct i915_buddy_block *block) -{ - unsigned int block_order = i915_buddy_block_order(block) - 1; - u64 offset = i915_buddy_block_offset(block); - - GEM_BUG_ON(!i915_buddy_block_is_free(block)); - GEM_BUG_ON(!i915_buddy_block_order(block)); - - block->left = i915_block_alloc(block, block_order, offset); - if (!block->left) - return -ENOMEM; - - block->right = i915_block_alloc(block, block_order, - offset + (mm->chunk_size << block_order)); - if (!block->right) { - i915_block_free(block->left); - return -ENOMEM; - } - - mark_free(mm, block->left); - mark_free(mm, block->right); - - mark_split(block); - - return 0; -} - -static struct i915_buddy_block * -get_buddy(struct i915_buddy_block *block) -{ - struct i915_buddy_block *parent; - - parent = block->parent; - if (!parent) - return NULL; - - if (parent->left == block) - return parent->right; - - return parent->left; -} - -static void __i915_buddy_free(struct i915_buddy_mm *mm, - struct i915_buddy_block *block) -{ - struct i915_buddy_block *parent; - - while ((parent = block->parent)) { - struct i915_buddy_block *buddy; - - buddy = get_buddy(block); - - if (!i915_buddy_block_is_free(buddy)) - break; - - list_del(&buddy->link); - - i915_block_free(block); - i915_block_free(buddy); - - block = parent; - } - - mark_free(mm, block); -} - -void i915_buddy_free(struct i915_buddy_mm *mm, - struct i915_buddy_block *block) -{ - GEM_BUG_ON(!i915_buddy_block_is_allocated(block)); - __i915_buddy_free(mm, block); -} - -void i915_buddy_free_list(struct i915_buddy_mm *mm, struct list_head *objects) -{ - struct i915_buddy_block *block, *on; - - list_for_each_entry_safe(block, on, objects, link) { - i915_buddy_free(mm, block); - cond_resched(); - } - INIT_LIST_HEAD(objects); -} - -/* - * Allocate power-of-two block. The order value here translates to: - * - * 0 = 2^0 * mm->chunk_size - * 1 = 2^1 * mm->chunk_size - * 2 = 2^2 * mm->chunk_size - * ... - */ -struct i915_buddy_block * -i915_buddy_alloc(struct i915_buddy_mm *mm, unsigned int order) -{ - struct i915_buddy_block *block = NULL; - unsigned int i; - int err; - - for (i = order; i <= mm->max_order; ++i) { - block = list_first_entry_or_null(&mm->free_list[i], - struct i915_buddy_block, - link); - if (block) - break; - } - - if (!block) - return ERR_PTR(-ENOSPC); - - GEM_BUG_ON(!i915_buddy_block_is_free(block)); - - while (i != order) { - err = split_block(mm, block); - if (unlikely(err)) - goto out_free; - - /* Go low */ - block = block->left; - i--; - } - - mark_allocated(block); - kmemleak_update_trace(block); - return block; - -out_free: - if (i != order) - __i915_buddy_free(mm, block); - return ERR_PTR(err); -} - -static inline bool overlaps(u64 s1, u64 e1, u64 s2, u64 e2) -{ - return s1 <= e2 && e1 >= s2; -} - -static inline bool contains(u64 s1, u64 e1, u64 s2, u64 e2) -{ - return s1 <= s2 && e1 >= e2; -} - -/* - * Allocate range. Note that it's safe to chain together multiple alloc_ranges - * with the same blocks list. - * - * Intended for pre-allocating portions of the address space, for example to - * reserve a block for the initial framebuffer or similar, hence the expectation - * here is that i915_buddy_alloc() is still the main vehicle for - * allocations, so if that's not the case then the drm_mm range allocator is - * probably a much better fit, and so you should probably go use that instead. - */ -int i915_buddy_alloc_range(struct i915_buddy_mm *mm, - struct list_head *blocks, - u64 start, u64 size) -{ - struct i915_buddy_block *block; - struct i915_buddy_block *buddy; - LIST_HEAD(allocated); - LIST_HEAD(dfs); - u64 end; - int err; - int i; - - if (size < mm->chunk_size) - return -EINVAL; - - if (!IS_ALIGNED(size | start, mm->chunk_size)) - return -EINVAL; - - if (range_overflows(start, size, mm->size)) - return -EINVAL; - - for (i = 0; i < mm->n_roots; ++i) - list_add_tail(&mm->roots[i]->tmp_link, &dfs); - - end = start + size - 1; - - do { - u64 block_start; - u64 block_end; - - block = list_first_entry_or_null(&dfs, - struct i915_buddy_block, - tmp_link); - if (!block) - break; - - list_del(&block->tmp_link); - - block_start = i915_buddy_block_offset(block); - block_end = block_start + i915_buddy_block_size(mm, block) - 1; - - if (!overlaps(start, end, block_start, block_end)) - continue; - - if (i915_buddy_block_is_allocated(block)) { - err = -ENOSPC; - goto err_free; - } - - if (contains(start, end, block_start, block_end)) { - if (!i915_buddy_block_is_free(block)) { - err = -ENOSPC; - goto err_free; - } - - mark_allocated(block); - list_add_tail(&block->link, &allocated); - continue; - } - - if (!i915_buddy_block_is_split(block)) { - err = split_block(mm, block); - if (unlikely(err)) - goto err_undo; - } - - list_add(&block->right->tmp_link, &dfs); - list_add(&block->left->tmp_link, &dfs); - } while (1); - - list_splice_tail(&allocated, blocks); - return 0; - -err_undo: - /* - * We really don't want to leave around a bunch of split blocks, since - * bigger is better, so make sure we merge everything back before we - * free the allocated blocks. - */ - buddy = get_buddy(block); - if (buddy && - (i915_buddy_block_is_free(block) && - i915_buddy_block_is_free(buddy))) - __i915_buddy_free(mm, block); - -err_free: - i915_buddy_free_list(mm, &allocated); - return err; -} - -#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) -#include "selftests/i915_buddy.c" -#endif diff --git a/drivers/gpu/drm/i915/i915_buddy.h b/drivers/gpu/drm/i915/i915_buddy.h deleted file mode 100644 index 9ce5200f4001..000000000000 --- a/drivers/gpu/drm/i915/i915_buddy.h +++ /dev/null @@ -1,131 +0,0 @@ -/* SPDX-License-Identifier: MIT */ -/* - * Copyright © 2019 Intel Corporation - */ - -#ifndef __I915_BUDDY_H__ -#define __I915_BUDDY_H__ - -#include <linux/bitops.h> -#include <linux/list.h> - -struct i915_buddy_block { -#define I915_BUDDY_HEADER_OFFSET GENMASK_ULL(63, 12) -#define I915_BUDDY_HEADER_STATE GENMASK_ULL(11, 10) -#define I915_BUDDY_ALLOCATED (1 << 10) -#define I915_BUDDY_FREE (2 << 10) -#define I915_BUDDY_SPLIT (3 << 10) -/* Free to be used, if needed in the future */ -#define I915_BUDDY_HEADER_UNUSED GENMASK_ULL(9, 6) -#define I915_BUDDY_HEADER_ORDER GENMASK_ULL(5, 0) - u64 header; - - struct i915_buddy_block *left; - struct i915_buddy_block *right; - struct i915_buddy_block *parent; - - void *private; /* owned by creator */ - - /* - * While the block is allocated by the user through i915_buddy_alloc*, - * the user has ownership of the link, for example to maintain within - * a list, if so desired. As soon as the block is freed with - * i915_buddy_free* ownership is given back to the mm. - */ - struct list_head link; - struct list_head tmp_link; -}; - -/* Order-zero must be at least PAGE_SIZE */ -#define I915_BUDDY_MAX_ORDER (63 - PAGE_SHIFT) - -/* - * Binary Buddy System. - * - * Locking should be handled by the user, a simple mutex around - * i915_buddy_alloc* and i915_buddy_free* should suffice. - */ -struct i915_buddy_mm { - /* Maintain a free list for each order. */ - struct list_head *free_list; - - /* - * Maintain explicit binary tree(s) to track the allocation of the - * address space. This gives us a simple way of finding a buddy block - * and performing the potentially recursive merge step when freeing a - * block. Nodes are either allocated or free, in which case they will - * also exist on the respective free list. - */ - struct i915_buddy_block **roots; - - /* - * Anything from here is public, and remains static for the lifetime of - * the mm. Everything above is considered do-not-touch. - */ - unsigned int n_roots; - unsigned int max_order; - - /* Must be at least PAGE_SIZE */ - u64 chunk_size; - u64 size; -}; - -static inline u64 -i915_buddy_block_offset(struct i915_buddy_block *block) -{ - return block->header & I915_BUDDY_HEADER_OFFSET; -} - -static inline unsigned int -i915_buddy_block_order(struct i915_buddy_block *block) -{ - return block->header & I915_BUDDY_HEADER_ORDER; -} - -static inline unsigned int -i915_buddy_block_state(struct i915_buddy_block *block) -{ - return block->header & I915_BUDDY_HEADER_STATE; -} - -static inline bool -i915_buddy_block_is_allocated(struct i915_buddy_block *block) -{ - return i915_buddy_block_state(block) == I915_BUDDY_ALLOCATED; -} - -static inline bool -i915_buddy_block_is_free(struct i915_buddy_block *block) -{ - return i915_buddy_block_state(block) == I915_BUDDY_FREE; -} - -static inline bool -i915_buddy_block_is_split(struct i915_buddy_block *block) -{ - return i915_buddy_block_state(block) == I915_BUDDY_SPLIT; -} - -static inline u64 -i915_buddy_block_size(struct i915_buddy_mm *mm, - struct i915_buddy_block *block) -{ - return mm->chunk_size << i915_buddy_block_order(block); -} - -int i915_buddy_init(struct i915_buddy_mm *mm, u64 size, u64 chunk_size); - -void i915_buddy_fini(struct i915_buddy_mm *mm); - -struct i915_buddy_block * -i915_buddy_alloc(struct i915_buddy_mm *mm, unsigned int order); - -int i915_buddy_alloc_range(struct i915_buddy_mm *mm, - struct list_head *blocks, - u64 start, u64 size); - -void i915_buddy_free(struct i915_buddy_mm *mm, struct i915_buddy_block *block); - -void i915_buddy_free_list(struct i915_buddy_mm *mm, struct list_head *objects); - -#endif diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index d82a99e128cf..30c349137be2 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -84,6 +84,7 @@ #include "intel_gvt.h" #include "intel_memory_region.h" #include "intel_pm.h" +#include "intel_region_ttm.h" #include "intel_sideband.h" #include "vlv_suspend.h"
@@ -335,6 +336,10 @@ static int i915_driver_early_probe(struct drm_i915_private *dev_priv) if (ret < 0) goto err_workqueues;
+ ret = intel_region_ttm_device_init(dev_priv); + if (ret) + goto err_ttm; + intel_wopcm_init_early(&dev_priv->wopcm);
intel_gt_init_early(&dev_priv->gt, dev_priv); @@ -359,6 +364,8 @@ static int i915_driver_early_probe(struct drm_i915_private *dev_priv) err_gem: i915_gem_cleanup_early(dev_priv); intel_gt_driver_late_release(&dev_priv->gt); + intel_region_ttm_device_fini(dev_priv); +err_ttm: vlv_suspend_cleanup(dev_priv); err_workqueues: i915_workqueues_cleanup(dev_priv); @@ -376,6 +383,7 @@ static void i915_driver_late_release(struct drm_i915_private *dev_priv) intel_power_domains_cleanup(dev_priv); i915_gem_cleanup_early(dev_priv); intel_gt_driver_late_release(&dev_priv->gt); + intel_region_ttm_device_fini(dev_priv); vlv_suspend_cleanup(dev_priv); i915_workqueues_cleanup(dev_priv);
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 9cb02618ba15..3a985865db41 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -59,6 +59,7 @@ #include <drm/drm_atomic.h> #include <drm/drm_connector.h> #include <drm/i915_mei_hdcp_interface.h> +#include <drm/ttm/ttm_device.h>
#include "i915_params.h" #include "i915_reg.h" @@ -778,6 +779,7 @@ struct intel_cdclk_config {
struct i915_selftest_stash { atomic_t counter; + struct ida mock_region_instances; };
struct drm_i915_private { @@ -1167,6 +1169,9 @@ struct drm_i915_private { /* Mutex to protect the above hdcp component related values. */ struct mutex hdcp_comp_mutex;
+ /* The TTM device structure. */ + struct ttm_device bdev; + I915_SELFTEST_DECLARE(struct i915_selftest_stash selftest;)
/* @@ -1760,7 +1765,8 @@ void i915_gem_cleanup_userptr(struct drm_i915_private *dev_priv); void i915_gem_init_early(struct drm_i915_private *dev_priv); void i915_gem_cleanup_early(struct drm_i915_private *dev_priv);
-struct intel_memory_region *i915_gem_shmem_setup(struct drm_i915_private *i915); +struct intel_memory_region *i915_gem_shmem_setup(struct drm_i915_private *i915, + u16 type, u16 instance);
static inline void i915_gem_drain_freed_objects(struct drm_i915_private *i915) { diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index cffd7f4f87dc..0993d706f067 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1108,6 +1108,7 @@ int i915_gem_init(struct drm_i915_private *dev_priv) }
i915_gem_drain_freed_objects(dev_priv); + return ret; }
diff --git a/drivers/gpu/drm/i915/i915_globals.c b/drivers/gpu/drm/i915/i915_globals.c index 3aa213684293..77f1911c463b 100644 --- a/drivers/gpu/drm/i915/i915_globals.c +++ b/drivers/gpu/drm/i915/i915_globals.c @@ -87,7 +87,6 @@ static void __i915_globals_cleanup(void)
static __initconst int (* const initfn[])(void) = { i915_global_active_init, - i915_global_buddy_init, i915_global_context_init, i915_global_gem_context_init, i915_global_objects_init, diff --git a/drivers/gpu/drm/i915/i915_globals.h b/drivers/gpu/drm/i915/i915_globals.h index b2f5cd9b9b1a..2d199f411a4a 100644 --- a/drivers/gpu/drm/i915/i915_globals.h +++ b/drivers/gpu/drm/i915/i915_globals.h @@ -27,7 +27,6 @@ void i915_globals_exit(void);
/* constructors */ int i915_global_active_init(void); -int i915_global_buddy_init(void); int i915_global_context_init(void); int i915_global_gem_context_init(void); int i915_global_objects_init(void); diff --git a/drivers/gpu/drm/i915/i915_scatterlist.c b/drivers/gpu/drm/i915/i915_scatterlist.c index cc6b3846a8c7..69e9e6c3135e 100644 --- a/drivers/gpu/drm/i915/i915_scatterlist.c +++ b/drivers/gpu/drm/i915/i915_scatterlist.c @@ -6,6 +6,10 @@
#include "i915_scatterlist.h"
+#include <drm/drm_mm.h> + +#include <linux/slab.h> + bool i915_sg_trim(struct sg_table *orig_st) { struct sg_table new_st; @@ -34,6 +38,72 @@ bool i915_sg_trim(struct sg_table *orig_st) return true; }
+/** + * i915_sg_from_mm_node - Create an sg_table from a struct drm_mm_node + * @node: The drm_mm_node. + * @region_start: An offset to add to the dma addresses of the sg list. + * + * Create a struct sg_table, initializing it from a struct drm_mm_node, + * taking a maximum segment length into account, splitting into segments + * if necessary. + * + * Return: A pointer to a kmalloced struct sg_table on success, negative + * error code cast to an error pointer on failure. + */ +struct sg_table *i915_sg_from_mm_node(const struct drm_mm_node *node, + u64 region_start) +{ + const u64 max_segment = SZ_1G; /* Do we have a limit on this? */ + u64 segment_pages = max_segment >> PAGE_SHIFT; + u64 block_size, offset, prev_end; + struct sg_table *st; + struct scatterlist *sg; + + st = kmalloc(sizeof(*st), GFP_KERNEL); + if (!st) + return ERR_PTR(-ENOMEM); + + if (sg_alloc_table(st, DIV_ROUND_UP(node->size, segment_pages), + GFP_KERNEL)) { + kfree(st); + return ERR_PTR(-ENOMEM); + } + + sg = st->sgl; + st->nents = 0; + prev_end = (resource_size_t)-1; + block_size = node->size << PAGE_SHIFT; + offset = node->start << PAGE_SHIFT; + + while (block_size) { + u64 len; + + if (offset != prev_end || sg->length >= max_segment) { + if (st->nents) + sg = __sg_next(sg); + + sg_dma_address(sg) = region_start + offset; + sg_dma_len(sg) = 0; + sg->length = 0; + st->nents++; + } + + len = min(block_size, max_segment - sg->length); + sg->length += len; + sg_dma_len(sg) += len; + + offset += len; + block_size -= len; + + prev_end = offset; + } + + sg_mark_end(sg); + i915_sg_trim(st); + + return st; +} + #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) #include "selftests/scatterlist.c" #endif diff --git a/drivers/gpu/drm/i915/i915_scatterlist.h b/drivers/gpu/drm/i915/i915_scatterlist.h index b96baad66a3a..5acca45ea981 100644 --- a/drivers/gpu/drm/i915/i915_scatterlist.h +++ b/drivers/gpu/drm/i915/i915_scatterlist.h @@ -13,6 +13,8 @@
#include "i915_gem.h"
+struct drm_mm_node; + /* * Optimised SGL iterator for GEM objects */ @@ -141,4 +143,6 @@ static inline unsigned int i915_sg_segment_size(void)
bool i915_sg_trim(struct sg_table *orig_st);
+struct sg_table *i915_sg_from_mm_node(const struct drm_mm_node *node, + u64 region_start); #endif diff --git a/drivers/gpu/drm/i915/intel_memory_region.c b/drivers/gpu/drm/i915/intel_memory_region.c index d98e8b81d322..4092cc987679 100644 --- a/drivers/gpu/drm/i915/intel_memory_region.c +++ b/drivers/gpu/drm/i915/intel_memory_region.c @@ -28,6 +28,11 @@ static const struct { }, };
+struct intel_region_reserve { + struct list_head link; + void *node; +}; + struct intel_memory_region * intel_memory_region_lookup(struct drm_i915_private *i915, u16 class, u16 instance) @@ -58,146 +63,61 @@ intel_memory_region_by_type(struct drm_i915_private *i915, return NULL; }
-static u64 -intel_memory_region_free_pages(struct intel_memory_region *mem, - struct list_head *blocks) +/** + * intel_memory_region_unreserve - Unreserve all previously reserved + * ranges + * @mem: The region containing the reserved ranges. + */ +void intel_memory_region_unreserve(struct intel_memory_region *mem) { - struct i915_buddy_block *block, *on; - u64 size = 0; + struct intel_region_reserve *reserve, *next;
- list_for_each_entry_safe(block, on, blocks, link) { - size += i915_buddy_block_size(&mem->mm, block); - i915_buddy_free(&mem->mm, block); - } - INIT_LIST_HEAD(blocks); + if (!mem->priv_ops || !mem->priv_ops->free) + return;
- return size; -} - -void -__intel_memory_region_put_pages_buddy(struct intel_memory_region *mem, - struct list_head *blocks) -{ mutex_lock(&mem->mm_lock); - mem->avail += intel_memory_region_free_pages(mem, blocks); - mutex_unlock(&mem->mm_lock); -} - -void -__intel_memory_region_put_block_buddy(struct i915_buddy_block *block) -{ - struct list_head blocks; - - INIT_LIST_HEAD(&blocks); - list_add(&block->link, &blocks); - __intel_memory_region_put_pages_buddy(block->private, &blocks); -} - -int -__intel_memory_region_get_pages_buddy(struct intel_memory_region *mem, - resource_size_t size, - unsigned int flags, - struct list_head *blocks) -{ - unsigned int min_order = 0; - unsigned long n_pages; - - GEM_BUG_ON(!IS_ALIGNED(size, mem->mm.chunk_size)); - GEM_BUG_ON(!list_empty(blocks)); - - if (flags & I915_ALLOC_MIN_PAGE_SIZE) { - min_order = ilog2(mem->min_page_size) - - ilog2(mem->mm.chunk_size); - } - - if (flags & I915_ALLOC_CONTIGUOUS) { - size = roundup_pow_of_two(size); - min_order = ilog2(size) - ilog2(mem->mm.chunk_size); + list_for_each_entry_safe(reserve, next, &mem->reserved, link) { + list_del(&reserve->link); + mem->priv_ops->free(mem, reserve->node); + kfree(reserve); } - - if (size > mem->mm.size) - return -E2BIG; - - n_pages = size >> ilog2(mem->mm.chunk_size); - - mutex_lock(&mem->mm_lock); - - do { - struct i915_buddy_block *block; - unsigned int order; - - order = fls(n_pages) - 1; - GEM_BUG_ON(order > mem->mm.max_order); - GEM_BUG_ON(order < min_order); - - do { - block = i915_buddy_alloc(&mem->mm, order); - if (!IS_ERR(block)) - break; - - if (order-- == min_order) - goto err_free_blocks; - } while (1); - - n_pages -= BIT(order); - - block->private = mem; - list_add_tail(&block->link, blocks); - - if (!n_pages) - break; - } while (1); - - mem->avail -= size; mutex_unlock(&mem->mm_lock); - return 0; - -err_free_blocks: - intel_memory_region_free_pages(mem, blocks); - mutex_unlock(&mem->mm_lock); - return -ENXIO; }
-struct i915_buddy_block * -__intel_memory_region_get_block_buddy(struct intel_memory_region *mem, - resource_size_t size, - unsigned int flags) +/** + * intel_memory_region_reserve - Reserve a memory range + * @mem: The region for which we want to reserve a range. + * @offset: Start of the range to reserve. + * @size: The size of the range to reserve. + * + * Return: 0 on success, negative error code on failure. + */ +int intel_memory_region_reserve(struct intel_memory_region *mem, + resource_size_t offset, + resource_size_t size) { - struct i915_buddy_block *block; - LIST_HEAD(blocks); int ret; + struct intel_region_reserve *reserve;
- ret = __intel_memory_region_get_pages_buddy(mem, size, flags, &blocks); - if (ret) - return ERR_PTR(ret); + if (!mem->priv_ops || !mem->priv_ops->reserve) + return -EINVAL;
- block = list_first_entry(&blocks, typeof(*block), link); - list_del_init(&block->link); - return block; -} + reserve = kzalloc(sizeof(*reserve), GFP_KERNEL); + if (!reserve) + return -ENOMEM;
-int intel_memory_region_init_buddy(struct intel_memory_region *mem) -{ - return i915_buddy_init(&mem->mm, resource_size(&mem->region), - PAGE_SIZE); -} - -void intel_memory_region_release_buddy(struct intel_memory_region *mem) -{ - i915_buddy_free_list(&mem->mm, &mem->reserved); - i915_buddy_fini(&mem->mm); -} - -int intel_memory_region_reserve(struct intel_memory_region *mem, - u64 offset, u64 size) -{ - int ret; + reserve->node = mem->priv_ops->reserve(mem, offset, size); + if (IS_ERR(reserve->node)) { + ret = PTR_ERR(reserve->node); + kfree(reserve); + return ret; + }
mutex_lock(&mem->mm_lock); - ret = i915_buddy_alloc_range(&mem->mm, &mem->reserved, offset, size); + list_add_tail(&reserve->link, &mem->reserved); mutex_unlock(&mem->mm_lock);
- return ret; + return 0; }
struct intel_memory_region * @@ -206,6 +126,8 @@ intel_memory_region_create(struct drm_i915_private *i915, resource_size_t size, resource_size_t min_page_size, resource_size_t io_start, + u16 type, + u16 instance, const struct intel_memory_region_ops *ops) { struct intel_memory_region *mem; @@ -222,6 +144,8 @@ intel_memory_region_create(struct drm_i915_private *i915, mem->ops = ops; mem->total = size; mem->avail = mem->total; + mem->type = type; + mem->instance = instance;
mutex_init(&mem->objects.lock); INIT_LIST_HEAD(&mem->objects.list); @@ -259,6 +183,7 @@ static void __intel_memory_region_destroy(struct kref *kref) struct intel_memory_region *mem = container_of(kref, typeof(*mem), kref);
+ intel_memory_region_unreserve(mem); if (mem->ops->release) mem->ops->release(mem);
@@ -296,15 +221,15 @@ int intel_memory_regions_hw_probe(struct drm_i915_private *i915) instance = intel_region_map[i].instance; switch (type) { case INTEL_MEMORY_SYSTEM: - mem = i915_gem_shmem_setup(i915); + mem = i915_gem_shmem_setup(i915, type, instance); break; case INTEL_MEMORY_STOLEN_LOCAL: - mem = i915_gem_stolen_lmem_setup(i915); + mem = i915_gem_stolen_lmem_setup(i915, type, instance); if (!IS_ERR(mem)) i915->mm.stolen_region = mem; break; case INTEL_MEMORY_STOLEN_SYSTEM: - mem = i915_gem_stolen_smem_setup(i915); + mem = i915_gem_stolen_smem_setup(i915, type, instance); if (!IS_ERR(mem)) i915->mm.stolen_region = mem; break; @@ -321,9 +246,6 @@ int intel_memory_regions_hw_probe(struct drm_i915_private *i915) }
mem->id = i; - mem->type = type; - mem->instance = instance; - i915->mm.regions[i] = mem; }
diff --git a/drivers/gpu/drm/i915/intel_memory_region.h b/drivers/gpu/drm/i915/intel_memory_region.h index d24ce5a0b30b..e69cde13daf2 100644 --- a/drivers/gpu/drm/i915/intel_memory_region.h +++ b/drivers/gpu/drm/i915/intel_memory_region.h @@ -13,8 +13,6 @@ #include <drm/drm_mm.h> #include <drm/i915_drm.h>
-#include "i915_buddy.h" - struct drm_i915_private; struct drm_i915_gem_object; struct intel_memory_region; @@ -25,6 +23,7 @@ enum intel_memory_type { INTEL_MEMORY_LOCAL = I915_MEMORY_CLASS_DEVICE, INTEL_MEMORY_STOLEN_SYSTEM, INTEL_MEMORY_STOLEN_LOCAL, + INTEL_MEMORY_MOCK, };
enum intel_region_id { @@ -59,10 +58,19 @@ struct intel_memory_region_ops { unsigned int flags); };
+struct intel_memory_region_private_ops { + void *(*reserve)(struct intel_memory_region *mem, + resource_size_t offset, + resource_size_t size); + void (*free)(struct intel_memory_region *mem, + void *node); +}; + struct intel_memory_region { struct drm_i915_private *i915;
const struct intel_memory_region_ops *ops; + const struct intel_memory_region_private_ops *priv_ops;
struct io_mapping iomap; struct resource region; @@ -70,7 +78,6 @@ struct intel_memory_region { /* For fake LMEM */ struct drm_mm_node fake_mappable;
- struct i915_buddy_mm mm; struct mutex mm_lock;
struct kref kref; @@ -95,36 +102,26 @@ struct intel_memory_region { struct list_head list; struct list_head purgeable; } objects; + + size_t chunk_size; + unsigned int max_order; + bool is_range_manager; + + void *region_private; };
struct intel_memory_region * intel_memory_region_lookup(struct drm_i915_private *i915, u16 class, u16 instance);
-int intel_memory_region_init_buddy(struct intel_memory_region *mem); -void intel_memory_region_release_buddy(struct intel_memory_region *mem); - -int __intel_memory_region_get_pages_buddy(struct intel_memory_region *mem, - resource_size_t size, - unsigned int flags, - struct list_head *blocks); -struct i915_buddy_block * -__intel_memory_region_get_block_buddy(struct intel_memory_region *mem, - resource_size_t size, - unsigned int flags); -void __intel_memory_region_put_pages_buddy(struct intel_memory_region *mem, - struct list_head *blocks); -void __intel_memory_region_put_block_buddy(struct i915_buddy_block *block); - -int intel_memory_region_reserve(struct intel_memory_region *mem, - u64 offset, u64 size); - struct intel_memory_region * intel_memory_region_create(struct drm_i915_private *i915, resource_size_t start, resource_size_t size, resource_size_t min_page_size, resource_size_t io_start, + u16 type, + u16 instance, const struct intel_memory_region_ops *ops);
struct intel_memory_region * @@ -141,4 +138,9 @@ __printf(2, 3) void intel_memory_region_set_name(struct intel_memory_region *mem, const char *fmt, ...);
+void intel_memory_region_unreserve(struct intel_memory_region *mem); + +int intel_memory_region_reserve(struct intel_memory_region *mem, + resource_size_t offset, + resource_size_t size); #endif diff --git a/drivers/gpu/drm/i915/intel_region_ttm.c b/drivers/gpu/drm/i915/intel_region_ttm.c new file mode 100644 index 000000000000..c8ac118c21f6 --- /dev/null +++ b/drivers/gpu/drm/i915/intel_region_ttm.c @@ -0,0 +1,220 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2021 Intel Corporation + */ +#include <drm/ttm/ttm_bo_driver.h> +#include <drm/ttm/ttm_device.h> + +#include "i915_drv.h" +#include "i915_scatterlist.h" + +#include "intel_region_ttm.h" + +/** + * DOC: TTM support structure + * + * The code in this file deals with setting up memory managers for TTM + * LMEM and MOCK regions and converting the output from + * the managers to struct sg_table, Basically providing the mapping from + * i915 GEM regions to TTM memory types and resource managers. + */ + +/* A Zero-initialized driver for now. We don't have a TTM backend yet. */ +static struct ttm_device_funcs i915_ttm_bo_driver; + +/** + * intel_region_ttm_device_init - Initialize a TTM device + * @dev_priv: Pointer to an i915 device private structure. + * + * Return: 0 on success, negative error code on failure. + */ +int intel_region_ttm_device_init(struct drm_i915_private *dev_priv) +{ + struct drm_device *drm = &dev_priv->drm; + + return ttm_device_init(&dev_priv->bdev, &i915_ttm_bo_driver, + drm->dev, drm->anon_inode->i_mapping, + drm->vma_offset_manager, false, false); +} + +/** + * intel_region_ttm_device_fini - Finalize a TTM device + * @dev_priv: Pointer to an i915 device private structure. + */ +void intel_region_ttm_device_fini(struct drm_i915_private *dev_priv) +{ + ttm_device_fini(&dev_priv->bdev); +} + +/* + * Map the i915 memory regions to TTM memory types. We use the + * driver-private types for now, reserving TTM_PL_VRAM for stolen + * memory and TTM_PL_TT for GGTT use if decided to implement this. + */ +static int intel_region_to_ttm_type(struct intel_memory_region *mem) +{ + int type; + + GEM_BUG_ON(mem->type != INTEL_MEMORY_LOCAL && + mem->type != INTEL_MEMORY_MOCK); + + type = mem->instance + TTM_PL_PRIV; + GEM_BUG_ON(type >= TTM_NUM_MEM_TYPES); + + return type; +} + +static void *intel_region_ttm_node_reserve(struct intel_memory_region *mem, + resource_size_t offset, + resource_size_t size) +{ + struct ttm_resource_manager *man = mem->region_private; + struct ttm_place place = {}; + struct ttm_resource res = {}; + struct ttm_buffer_object mock_bo = {}; + int ret; + + /* + * Having to use a mock_bo is unfortunate but stems from some + * drivers having private managers that insist to know what the + * allocate memory is intended for, using it to send private + * data to the manager. Also recently the bo has been used to send + * alignment info to the manager. Assume that apart from the latter, + * none of the managers we use will ever access the buffer object + * members, hoping we can pass the alignment info in the + * struct ttm_place in the future. + */ + + place.fpfn = offset >> PAGE_SHIFT; + place.lpfn = place.fpfn + (size >> PAGE_SHIFT); + res.num_pages = size >> PAGE_SHIFT; + ret = man->func->alloc(man, &mock_bo, &place, &res); + if (ret == -ENOSPC) + ret = -ENXIO; + + return ret ? ERR_PTR(ret) : res.mm_node; +} + +/** + * intel_region_ttm_node_free - Free a node allocated from a resource manager + * @mem: The region the node was allocated from. + * @node: The opaque node representing an allocation. + */ +void intel_region_ttm_node_free(struct intel_memory_region *mem, + void *node) +{ + struct ttm_resource_manager *man = mem->region_private; + struct ttm_resource res = {}; + + res.mm_node = node; + man->func->free(man, &res); +} + +static const struct intel_memory_region_private_ops priv_ops = { + .reserve = intel_region_ttm_node_reserve, + .free = intel_region_ttm_node_free, +}; + +int intel_region_ttm_init(struct intel_memory_region *mem) +{ + struct ttm_device *bdev = &mem->i915->bdev; + int mem_type = intel_region_to_ttm_type(mem); + int ret; + + ret = ttm_range_man_init(bdev, mem_type, false, + resource_size(&mem->region) >> PAGE_SHIFT); + if (ret) + return ret; + + mem->chunk_size = PAGE_SIZE; + mem->max_order = + get_order(rounddown_pow_of_two(resource_size(&mem->region))); + mem->is_range_manager = true; + mem->priv_ops = &priv_ops; + mem->region_private = ttm_manager_type(bdev, mem_type); + + return 0; +} + +/** + * intel_region_ttm_fini - Finalize a TTM region. + * @mem: The memory region + * + * This functions takes down the TTM resource manager associated with the + * memory region, and if it was registered with the TTM device, + * removes that registration. + */ +void intel_region_ttm_fini(struct intel_memory_region *mem) +{ + int ret; + + ret = ttm_range_man_fini(&mem->i915->bdev, + intel_region_to_ttm_type(mem)); + GEM_WARN_ON(ret); + mem->region_private = NULL; +} + +/** + * intel_region_ttm_node_to_st - Convert an opaque TTM resource manager node + * to an sg_table. + * @mem: The memory region. + * @node: The resource manager node obtained from the TTM resource manager. + * + * The gem backends typically use sg-tables for operations on the underlying + * io_memory. So provide a way for the backends to translate the + * nodes they are handed from TTM to sg-tables. + * + * Return: A malloced sg_table on success, an error pointer on failure. + */ +struct sg_table *intel_region_ttm_node_to_st(struct intel_memory_region *mem, + void *node) +{ + return i915_sg_from_mm_node(node, mem->region.start); +} + +/** + * intel_region_ttm_node_alloc - Allocate memory resources from a region + * @mem: The memory region, + * @size: The requested size in bytes + * @flags: Allocation flags + * + * This functionality is provided only for callers that need to allocate + * memory from standalone TTM range managers, without the TTM eviction + * functionality. Don't use if you are not completely sure that's the + * case. The returned opaque node can be converted to an sg_table using + * intel_region_ttm_node_to_st(), and can be freed using + * intel_region_ttm_node_free(). + * + * Return: A valid pointer on success, an error pointer on failure. + */ +void *intel_region_ttm_node_alloc(struct intel_memory_region *mem, + resource_size_t size, + unsigned int flags) +{ + struct ttm_resource_manager *man = mem->region_private; + struct ttm_place place = {}; + struct ttm_resource res = {}; + struct ttm_buffer_object mock_bo = {}; + int ret; + + /* + * We ignore the flags for now since we're using the range + * manager and contigous and min page size would be fulfilled + * by default if size is min page size aligned. + */ + res.num_pages = size >> PAGE_SHIFT; + + if (mem->is_range_manager) { + if (size >= SZ_1G) + mock_bo.page_alignment = SZ_1G >> PAGE_SHIFT; + else if (size >= SZ_2M) + mock_bo.page_alignment = SZ_2M >> PAGE_SHIFT; + else if (size >= SZ_64K) + mock_bo.page_alignment = SZ_64K >> PAGE_SHIFT; + } + + ret = man->func->alloc(man, &mock_bo, &place, &res); + if (ret == -ENOSPC) + ret = -ENXIO; + return ret ? ERR_PTR(ret) : res.mm_node; +} diff --git a/drivers/gpu/drm/i915/intel_region_ttm.h b/drivers/gpu/drm/i915/intel_region_ttm.h new file mode 100644 index 000000000000..1c82c6c3429d --- /dev/null +++ b/drivers/gpu/drm/i915/intel_region_ttm.h @@ -0,0 +1,32 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright © 2021 Intel Corporation + */ +#ifndef _INTEL_REGION_TTM_H_ +#define _INTEL_REGION_TTM_H_ + +#include <linux/types.h> + +#include "i915_selftest.h" + +struct drm_i915_private; +struct intel_memory_region; + +int intel_region_ttm_device_init(struct drm_i915_private *dev_priv); + +void intel_region_ttm_device_fini(struct drm_i915_private *dev_priv); + +int intel_region_ttm_init(struct intel_memory_region *mem); + +void intel_region_ttm_fini(struct intel_memory_region *mem); + +struct sg_table *intel_region_ttm_node_to_st(struct intel_memory_region *mem, + void *node); + +void *intel_region_ttm_node_alloc(struct intel_memory_region *mem, + resource_size_t size, + unsigned int flags); + +void intel_region_ttm_node_free(struct intel_memory_region *mem, + void *node); +#endif /* _INTEL_REGION_TTM_H_ */ diff --git a/drivers/gpu/drm/i915/selftests/i915_buddy.c b/drivers/gpu/drm/i915/selftests/i915_buddy.c deleted file mode 100644 index f0f5c4df8dbc..000000000000 --- a/drivers/gpu/drm/i915/selftests/i915_buddy.c +++ /dev/null @@ -1,789 +0,0 @@ -// SPDX-License-Identifier: MIT -/* - * Copyright © 2019 Intel Corporation - */ - -#include <linux/prime_numbers.h> - -#include "../i915_selftest.h" -#include "i915_random.h" - -static void __igt_dump_block(struct i915_buddy_mm *mm, - struct i915_buddy_block *block, - bool buddy) -{ - pr_err("block info: header=%llx, state=%u, order=%d, offset=%llx size=%llx root=%s buddy=%s\n", - block->header, - i915_buddy_block_state(block), - i915_buddy_block_order(block), - i915_buddy_block_offset(block), - i915_buddy_block_size(mm, block), - yesno(!block->parent), - yesno(buddy)); -} - -static void igt_dump_block(struct i915_buddy_mm *mm, - struct i915_buddy_block *block) -{ - struct i915_buddy_block *buddy; - - __igt_dump_block(mm, block, false); - - buddy = get_buddy(block); - if (buddy) - __igt_dump_block(mm, buddy, true); -} - -static int igt_check_block(struct i915_buddy_mm *mm, - struct i915_buddy_block *block) -{ - struct i915_buddy_block *buddy; - unsigned int block_state; - u64 block_size; - u64 offset; - int err = 0; - - block_state = i915_buddy_block_state(block); - - if (block_state != I915_BUDDY_ALLOCATED && - block_state != I915_BUDDY_FREE && - block_state != I915_BUDDY_SPLIT) { - pr_err("block state mismatch\n"); - err = -EINVAL; - } - - block_size = i915_buddy_block_size(mm, block); - offset = i915_buddy_block_offset(block); - - if (block_size < mm->chunk_size) { - pr_err("block size smaller than min size\n"); - err = -EINVAL; - } - - if (!is_power_of_2(block_size)) { - pr_err("block size not power of two\n"); - err = -EINVAL; - } - - if (!IS_ALIGNED(block_size, mm->chunk_size)) { - pr_err("block size not aligned to min size\n"); - err = -EINVAL; - } - - if (!IS_ALIGNED(offset, mm->chunk_size)) { - pr_err("block offset not aligned to min size\n"); - err = -EINVAL; - } - - if (!IS_ALIGNED(offset, block_size)) { - pr_err("block offset not aligned to block size\n"); - err = -EINVAL; - } - - buddy = get_buddy(block); - - if (!buddy && block->parent) { - pr_err("buddy has gone fishing\n"); - err = -EINVAL; - } - - if (buddy) { - if (i915_buddy_block_offset(buddy) != (offset ^ block_size)) { - pr_err("buddy has wrong offset\n"); - err = -EINVAL; - } - - if (i915_buddy_block_size(mm, buddy) != block_size) { - pr_err("buddy size mismatch\n"); - err = -EINVAL; - } - - if (i915_buddy_block_state(buddy) == block_state && - block_state == I915_BUDDY_FREE) { - pr_err("block and its buddy are free\n"); - err = -EINVAL; - } - } - - return err; -} - -static int igt_check_blocks(struct i915_buddy_mm *mm, - struct list_head *blocks, - u64 expected_size, - bool is_contiguous) -{ - struct i915_buddy_block *block; - struct i915_buddy_block *prev; - u64 total; - int err = 0; - - block = NULL; - prev = NULL; - total = 0; - - list_for_each_entry(block, blocks, link) { - err = igt_check_block(mm, block); - - if (!i915_buddy_block_is_allocated(block)) { - pr_err("block not allocated\n"), - err = -EINVAL; - } - - if (is_contiguous && prev) { - u64 prev_block_size; - u64 prev_offset; - u64 offset; - - prev_offset = i915_buddy_block_offset(prev); - prev_block_size = i915_buddy_block_size(mm, prev); - offset = i915_buddy_block_offset(block); - - if (offset != (prev_offset + prev_block_size)) { - pr_err("block offset mismatch\n"); - err = -EINVAL; - } - } - - if (err) - break; - - total += i915_buddy_block_size(mm, block); - prev = block; - } - - if (!err) { - if (total != expected_size) { - pr_err("size mismatch, expected=%llx, found=%llx\n", - expected_size, total); - err = -EINVAL; - } - return err; - } - - if (prev) { - pr_err("prev block, dump:\n"); - igt_dump_block(mm, prev); - } - - if (block) { - pr_err("bad block, dump:\n"); - igt_dump_block(mm, block); - } - - return err; -} - -static int igt_check_mm(struct i915_buddy_mm *mm) -{ - struct i915_buddy_block *root; - struct i915_buddy_block *prev; - unsigned int i; - u64 total; - int err = 0; - - if (!mm->n_roots) { - pr_err("n_roots is zero\n"); - return -EINVAL; - } - - if (mm->n_roots != hweight64(mm->size)) { - pr_err("n_roots mismatch, n_roots=%u, expected=%lu\n", - mm->n_roots, hweight64(mm->size)); - return -EINVAL; - } - - root = NULL; - prev = NULL; - total = 0; - - for (i = 0; i < mm->n_roots; ++i) { - struct i915_buddy_block *block; - unsigned int order; - - root = mm->roots[i]; - if (!root) { - pr_err("root(%u) is NULL\n", i); - err = -EINVAL; - break; - } - - err = igt_check_block(mm, root); - - if (!i915_buddy_block_is_free(root)) { - pr_err("root not free\n"); - err = -EINVAL; - } - - order = i915_buddy_block_order(root); - - if (!i) { - if (order != mm->max_order) { - pr_err("max order root missing\n"); - err = -EINVAL; - } - } - - if (prev) { - u64 prev_block_size; - u64 prev_offset; - u64 offset; - - prev_offset = i915_buddy_block_offset(prev); - prev_block_size = i915_buddy_block_size(mm, prev); - offset = i915_buddy_block_offset(root); - - if (offset != (prev_offset + prev_block_size)) { - pr_err("root offset mismatch\n"); - err = -EINVAL; - } - } - - block = list_first_entry_or_null(&mm->free_list[order], - struct i915_buddy_block, - link); - if (block != root) { - pr_err("root mismatch at order=%u\n", order); - err = -EINVAL; - } - - if (err) - break; - - prev = root; - total += i915_buddy_block_size(mm, root); - } - - if (!err) { - if (total != mm->size) { - pr_err("expected mm size=%llx, found=%llx\n", mm->size, - total); - err = -EINVAL; - } - return err; - } - - if (prev) { - pr_err("prev root(%u), dump:\n", i - 1); - igt_dump_block(mm, prev); - } - - if (root) { - pr_err("bad root(%u), dump:\n", i); - igt_dump_block(mm, root); - } - - return err; -} - -static void igt_mm_config(u64 *size, u64 *chunk_size) -{ - I915_RND_STATE(prng); - u32 s, ms; - - /* Nothing fancy, just try to get an interesting bit pattern */ - - prandom_seed_state(&prng, i915_selftest.random_seed); - - /* Let size be a random number of pages up to 8 GB (2M pages) */ - s = 1 + i915_prandom_u32_max_state((BIT(33 - 12)) - 1, &prng); - /* Let the chunk size be a random power of 2 less than size */ - ms = BIT(i915_prandom_u32_max_state(ilog2(s), &prng)); - /* Round size down to the chunk size */ - s &= -ms; - - /* Convert from pages to bytes */ - *chunk_size = (u64)ms << 12; - *size = (u64)s << 12; -} - -static int igt_buddy_alloc_smoke(void *arg) -{ - struct i915_buddy_mm mm; - IGT_TIMEOUT(end_time); - I915_RND_STATE(prng); - u64 chunk_size; - u64 mm_size; - int *order; - int err, i; - - igt_mm_config(&mm_size, &chunk_size); - - pr_info("buddy_init with size=%llx, chunk_size=%llx\n", mm_size, chunk_size); - - err = i915_buddy_init(&mm, mm_size, chunk_size); - if (err) { - pr_err("buddy_init failed(%d)\n", err); - return err; - } - - order = i915_random_order(mm.max_order + 1, &prng); - if (!order) - goto out_fini; - - for (i = 0; i <= mm.max_order; ++i) { - struct i915_buddy_block *block; - int max_order = order[i]; - bool timeout = false; - LIST_HEAD(blocks); - int order; - u64 total; - - err = igt_check_mm(&mm); - if (err) { - pr_err("pre-mm check failed, abort\n"); - break; - } - - pr_info("filling from max_order=%u\n", max_order); - - order = max_order; - total = 0; - - do { -retry: - block = i915_buddy_alloc(&mm, order); - if (IS_ERR(block)) { - err = PTR_ERR(block); - if (err == -ENOMEM) { - pr_info("buddy_alloc hit -ENOMEM with order=%d\n", - order); - } else { - if (order--) { - err = 0; - goto retry; - } - - pr_err("buddy_alloc with order=%d failed(%d)\n", - order, err); - } - - break; - } - - list_add_tail(&block->link, &blocks); - - if (i915_buddy_block_order(block) != order) { - pr_err("buddy_alloc order mismatch\n"); - err = -EINVAL; - break; - } - - total += i915_buddy_block_size(&mm, block); - - if (__igt_timeout(end_time, NULL)) { - timeout = true; - break; - } - } while (total < mm.size); - - if (!err) - err = igt_check_blocks(&mm, &blocks, total, false); - - i915_buddy_free_list(&mm, &blocks); - - if (!err) { - err = igt_check_mm(&mm); - if (err) - pr_err("post-mm check failed\n"); - } - - if (err || timeout) - break; - - cond_resched(); - } - - if (err == -ENOMEM) - err = 0; - - kfree(order); -out_fini: - i915_buddy_fini(&mm); - - return err; -} - -static int igt_buddy_alloc_pessimistic(void *arg) -{ - const unsigned int max_order = 16; - struct i915_buddy_block *block, *bn; - struct i915_buddy_mm mm; - unsigned int order; - LIST_HEAD(blocks); - int err; - - /* - * Create a pot-sized mm, then allocate one of each possible - * order within. This should leave the mm with exactly one - * page left. - */ - - err = i915_buddy_init(&mm, PAGE_SIZE << max_order, PAGE_SIZE); - if (err) { - pr_err("buddy_init failed(%d)\n", err); - return err; - } - GEM_BUG_ON(mm.max_order != max_order); - - for (order = 0; order < max_order; order++) { - block = i915_buddy_alloc(&mm, order); - if (IS_ERR(block)) { - pr_info("buddy_alloc hit -ENOMEM with order=%d\n", - order); - err = PTR_ERR(block); - goto err; - } - - list_add_tail(&block->link, &blocks); - } - - /* And now the last remaining block available */ - block = i915_buddy_alloc(&mm, 0); - if (IS_ERR(block)) { - pr_info("buddy_alloc hit -ENOMEM on final alloc\n"); - err = PTR_ERR(block); - goto err; - } - list_add_tail(&block->link, &blocks); - - /* Should be completely full! */ - for (order = max_order; order--; ) { - block = i915_buddy_alloc(&mm, order); - if (!IS_ERR(block)) { - pr_info("buddy_alloc unexpectedly succeeded at order %d, it should be full!", - order); - list_add_tail(&block->link, &blocks); - err = -EINVAL; - goto err; - } - } - - block = list_last_entry(&blocks, typeof(*block), link); - list_del(&block->link); - i915_buddy_free(&mm, block); - - /* As we free in increasing size, we make available larger blocks */ - order = 1; - list_for_each_entry_safe(block, bn, &blocks, link) { - list_del(&block->link); - i915_buddy_free(&mm, block); - - block = i915_buddy_alloc(&mm, order); - if (IS_ERR(block)) { - pr_info("buddy_alloc (realloc) hit -ENOMEM with order=%d\n", - order); - err = PTR_ERR(block); - goto err; - } - i915_buddy_free(&mm, block); - order++; - } - - /* To confirm, now the whole mm should be available */ - block = i915_buddy_alloc(&mm, max_order); - if (IS_ERR(block)) { - pr_info("buddy_alloc (realloc) hit -ENOMEM with order=%d\n", - max_order); - err = PTR_ERR(block); - goto err; - } - i915_buddy_free(&mm, block); - -err: - i915_buddy_free_list(&mm, &blocks); - i915_buddy_fini(&mm); - return err; -} - -static int igt_buddy_alloc_optimistic(void *arg) -{ - const int max_order = 16; - struct i915_buddy_block *block; - struct i915_buddy_mm mm; - LIST_HEAD(blocks); - int order; - int err; - - /* - * Create a mm with one block of each order available, and - * try to allocate them all. - */ - - err = i915_buddy_init(&mm, - PAGE_SIZE * ((1 << (max_order + 1)) - 1), - PAGE_SIZE); - if (err) { - pr_err("buddy_init failed(%d)\n", err); - return err; - } - GEM_BUG_ON(mm.max_order != max_order); - - for (order = 0; order <= max_order; order++) { - block = i915_buddy_alloc(&mm, order); - if (IS_ERR(block)) { - pr_info("buddy_alloc hit -ENOMEM with order=%d\n", - order); - err = PTR_ERR(block); - goto err; - } - - list_add_tail(&block->link, &blocks); - } - - /* Should be completely full! */ - block = i915_buddy_alloc(&mm, 0); - if (!IS_ERR(block)) { - pr_info("buddy_alloc unexpectedly succeeded, it should be full!"); - list_add_tail(&block->link, &blocks); - err = -EINVAL; - goto err; - } - -err: - i915_buddy_free_list(&mm, &blocks); - i915_buddy_fini(&mm); - return err; -} - -static int igt_buddy_alloc_pathological(void *arg) -{ - const int max_order = 16; - struct i915_buddy_block *block; - struct i915_buddy_mm mm; - LIST_HEAD(blocks); - LIST_HEAD(holes); - int order, top; - int err; - - /* - * Create a pot-sized mm, then allocate one of each possible - * order within. This should leave the mm with exactly one - * page left. Free the largest block, then whittle down again. - * Eventually we will have a fully 50% fragmented mm. - */ - - err = i915_buddy_init(&mm, PAGE_SIZE << max_order, PAGE_SIZE); - if (err) { - pr_err("buddy_init failed(%d)\n", err); - return err; - } - GEM_BUG_ON(mm.max_order != max_order); - - for (top = max_order; top; top--) { - /* Make room by freeing the largest allocated block */ - block = list_first_entry_or_null(&blocks, typeof(*block), link); - if (block) { - list_del(&block->link); - i915_buddy_free(&mm, block); - } - - for (order = top; order--; ) { - block = i915_buddy_alloc(&mm, order); - if (IS_ERR(block)) { - pr_info("buddy_alloc hit -ENOMEM with order=%d, top=%d\n", - order, top); - err = PTR_ERR(block); - goto err; - } - list_add_tail(&block->link, &blocks); - } - - /* There should be one final page for this sub-allocation */ - block = i915_buddy_alloc(&mm, 0); - if (IS_ERR(block)) { - pr_info("buddy_alloc hit -ENOMEM for hole\n"); - err = PTR_ERR(block); - goto err; - } - list_add_tail(&block->link, &holes); - - block = i915_buddy_alloc(&mm, top); - if (!IS_ERR(block)) { - pr_info("buddy_alloc unexpectedly succeeded at top-order %d/%d, it should be full!", - top, max_order); - list_add_tail(&block->link, &blocks); - err = -EINVAL; - goto err; - } - } - - i915_buddy_free_list(&mm, &holes); - - /* Nothing larger than blocks of chunk_size now available */ - for (order = 1; order <= max_order; order++) { - block = i915_buddy_alloc(&mm, order); - if (!IS_ERR(block)) { - pr_info("buddy_alloc unexpectedly succeeded at order %d, it should be full!", - order); - list_add_tail(&block->link, &blocks); - err = -EINVAL; - goto err; - } - } - -err: - list_splice_tail(&holes, &blocks); - i915_buddy_free_list(&mm, &blocks); - i915_buddy_fini(&mm); - return err; -} - -static int igt_buddy_alloc_range(void *arg) -{ - struct i915_buddy_mm mm; - unsigned long page_num; - LIST_HEAD(blocks); - u64 chunk_size; - u64 offset; - u64 size; - u64 rem; - int err; - - igt_mm_config(&size, &chunk_size); - - pr_info("buddy_init with size=%llx, chunk_size=%llx\n", size, chunk_size); - - err = i915_buddy_init(&mm, size, chunk_size); - if (err) { - pr_err("buddy_init failed(%d)\n", err); - return err; - } - - err = igt_check_mm(&mm); - if (err) { - pr_err("pre-mm check failed, abort, abort, abort!\n"); - goto err_fini; - } - - rem = mm.size; - offset = 0; - - for_each_prime_number_from(page_num, 1, ULONG_MAX - 1) { - struct i915_buddy_block *block; - LIST_HEAD(tmp); - - size = min(page_num * mm.chunk_size, rem); - - err = i915_buddy_alloc_range(&mm, &tmp, offset, size); - if (err) { - if (err == -ENOMEM) { - pr_info("alloc_range hit -ENOMEM with size=%llx\n", - size); - } else { - pr_err("alloc_range with offset=%llx, size=%llx failed(%d)\n", - offset, size, err); - } - - break; - } - - block = list_first_entry_or_null(&tmp, - struct i915_buddy_block, - link); - if (!block) { - pr_err("alloc_range has no blocks\n"); - err = -EINVAL; - break; - } - - if (i915_buddy_block_offset(block) != offset) { - pr_err("alloc_range start offset mismatch, found=%llx, expected=%llx\n", - i915_buddy_block_offset(block), offset); - err = -EINVAL; - } - - if (!err) - err = igt_check_blocks(&mm, &tmp, size, true); - - list_splice_tail(&tmp, &blocks); - - if (err) - break; - - offset += size; - - rem -= size; - if (!rem) - break; - - cond_resched(); - } - - if (err == -ENOMEM) - err = 0; - - i915_buddy_free_list(&mm, &blocks); - - if (!err) { - err = igt_check_mm(&mm); - if (err) - pr_err("post-mm check failed\n"); - } - -err_fini: - i915_buddy_fini(&mm); - - return err; -} - -static int igt_buddy_alloc_limit(void *arg) -{ - struct i915_buddy_block *block; - struct i915_buddy_mm mm; - const u64 size = U64_MAX; - int err; - - err = i915_buddy_init(&mm, size, PAGE_SIZE); - if (err) - return err; - - if (mm.max_order != I915_BUDDY_MAX_ORDER) { - pr_err("mm.max_order(%d) != %d\n", - mm.max_order, I915_BUDDY_MAX_ORDER); - err = -EINVAL; - goto out_fini; - } - - block = i915_buddy_alloc(&mm, mm.max_order); - if (IS_ERR(block)) { - err = PTR_ERR(block); - goto out_fini; - } - - if (i915_buddy_block_order(block) != mm.max_order) { - pr_err("block order(%d) != %d\n", - i915_buddy_block_order(block), mm.max_order); - err = -EINVAL; - goto out_free; - } - - if (i915_buddy_block_size(&mm, block) != - BIT_ULL(mm.max_order) * PAGE_SIZE) { - pr_err("block size(%llu) != %llu\n", - i915_buddy_block_size(&mm, block), - BIT_ULL(mm.max_order) * PAGE_SIZE); - err = -EINVAL; - goto out_free; - } - -out_free: - i915_buddy_free(&mm, block); -out_fini: - i915_buddy_fini(&mm); - return err; -} - -int i915_buddy_mock_selftests(void) -{ - static const struct i915_subtest tests[] = { - SUBTEST(igt_buddy_alloc_pessimistic), - SUBTEST(igt_buddy_alloc_optimistic), - SUBTEST(igt_buddy_alloc_pathological), - SUBTEST(igt_buddy_alloc_smoke), - SUBTEST(igt_buddy_alloc_range), - SUBTEST(igt_buddy_alloc_limit), - }; - - return i915_subtests(tests, NULL); -} diff --git a/drivers/gpu/drm/i915/selftests/i915_mock_selftests.h b/drivers/gpu/drm/i915/selftests/i915_mock_selftests.h index 3db34d3eea58..34e5caf38093 100644 --- a/drivers/gpu/drm/i915/selftests/i915_mock_selftests.h +++ b/drivers/gpu/drm/i915/selftests/i915_mock_selftests.h @@ -33,5 +33,4 @@ selftest(evict, i915_gem_evict_mock_selftests) selftest(gtt, i915_gem_gtt_mock_selftests) selftest(hugepages, i915_gem_huge_page_mock_selftests) selftest(contexts, i915_gem_context_mock_selftests) -selftest(buddy, i915_buddy_mock_selftests) selftest(memory_region, intel_memory_region_mock_selftests) diff --git a/drivers/gpu/drm/i915/selftests/intel_memory_region.c b/drivers/gpu/drm/i915/selftests/intel_memory_region.c index f85fd8cbfbf5..c85d516b85cd 100644 --- a/drivers/gpu/drm/i915/selftests/intel_memory_region.c +++ b/drivers/gpu/drm/i915/selftests/intel_memory_region.c @@ -57,9 +57,10 @@ static int igt_mock_fill(void *arg) LIST_HEAD(objects); int err = 0;
- page_size = mem->mm.chunk_size; - max_pages = div64_u64(total, page_size); + page_size = mem->chunk_size; rem = total; +retry: + max_pages = div64_u64(rem, page_size);
for_each_prime_number_from(page_num, 1, max_pages) { resource_size_t size = page_num * page_size; @@ -85,6 +86,11 @@ static int igt_mock_fill(void *arg) err = 0; if (err == -ENXIO) { if (page_num * page_size <= rem) { + if (mem->is_range_manager && max_pages > 1) { + max_pages >>= 1; + goto retry; + } + pr_err("%s failed, space still left in region\n", __func__); err = -EINVAL; @@ -199,12 +205,18 @@ static int igt_mock_reserve(void *arg) do { u32 size = i915_prandom_u32_max_state(cur_avail, &prng);
+retry: size = max_t(u32, round_up(size, PAGE_SIZE), PAGE_SIZE); obj = igt_object_create(mem, &objects, size, 0); if (IS_ERR(obj)) { - if (PTR_ERR(obj) == -ENXIO) + if (PTR_ERR(obj) == -ENXIO) { + if (mem->is_range_manager && + size > mem->chunk_size) { + size >>= 1; + goto retry; + } break; - + } err = PTR_ERR(obj); goto out_close; } @@ -220,7 +232,7 @@ static int igt_mock_reserve(void *arg) out_close: kfree(order); close_objects(mem, &objects); - i915_buddy_free_list(&mem->mm, &mem->reserved); + intel_memory_region_unreserve(mem); return err; }
@@ -240,7 +252,7 @@ static int igt_mock_contiguous(void *arg) total = resource_size(&mem->region);
/* Min size */ - obj = igt_object_create(mem, &objects, mem->mm.chunk_size, + obj = igt_object_create(mem, &objects, mem->chunk_size, I915_BO_ALLOC_CONTIGUOUS); if (IS_ERR(obj)) return PTR_ERR(obj); @@ -321,14 +333,16 @@ static int igt_mock_contiguous(void *arg) min = target; target = total >> 1;
- /* Make sure we can still allocate all the fragmented space */ - obj = igt_object_create(mem, &objects, target, 0); - if (IS_ERR(obj)) { - err = PTR_ERR(obj); - goto err_close_objects; - } + if (!mem->is_range_manager) { + /* Make sure we can still allocate all the fragmented space */ + obj = igt_object_create(mem, &objects, target, 0); + if (IS_ERR(obj)) { + err = PTR_ERR(obj); + goto err_close_objects; + }
- igt_object_release(obj); + igt_object_release(obj); + }
/* * Even though we have enough free space, we don't have a big enough @@ -348,7 +362,7 @@ static int igt_mock_contiguous(void *arg) }
target >>= 1; - } while (target >= mem->mm.chunk_size); + } while (target >= mem->chunk_size);
err_close_objects: list_splice_tail(&holes, &objects); @@ -368,7 +382,7 @@ static int igt_mock_splintered_region(void *arg)
/* * Sanity check we can still allocate everything even if the - * mm.max_order != mm.size. i.e our starting address space size is not a + * max_order != mm.size. i.e our starting address space size is not a * power-of-two. */
@@ -377,17 +391,10 @@ static int igt_mock_splintered_region(void *arg) if (IS_ERR(mem)) return PTR_ERR(mem);
- if (mem->mm.size != size) { - pr_err("%s size mismatch(%llu != %llu)\n", - __func__, mem->mm.size, size); - err = -EINVAL; - goto out_put; - } - expected_order = get_order(rounddown_pow_of_two(size)); - if (mem->mm.max_order != expected_order) { + if (mem->max_order != expected_order) { pr_err("%s order mismatch(%u != %u)\n", - __func__, mem->mm.max_order, expected_order); + __func__, mem->max_order, expected_order); err = -EINVAL; goto out_put; } @@ -408,12 +415,15 @@ static int igt_mock_splintered_region(void *arg) * sure that does indeed hold true. */
- obj = igt_object_create(mem, &objects, size, I915_BO_ALLOC_CONTIGUOUS); - if (!IS_ERR(obj)) { - pr_err("%s too large contiguous allocation was not rejected\n", - __func__); - err = -EINVAL; - goto out_close; + if (!mem->is_range_manager) { + obj = igt_object_create(mem, &objects, size, + I915_BO_ALLOC_CONTIGUOUS); + if (!IS_ERR(obj)) { + pr_err("%s too large contiguous allocation was not rejected\n", + __func__); + err = -EINVAL; + goto out_close; + } }
obj = igt_object_create(mem, &objects, rounddown_pow_of_two(size), @@ -432,68 +442,6 @@ static int igt_mock_splintered_region(void *arg) return err; }
-#ifndef SZ_8G -#define SZ_8G BIT_ULL(33) -#endif - -static int igt_mock_max_segment(void *arg) -{ - const unsigned int max_segment = i915_sg_segment_size(); - struct intel_memory_region *mem = arg; - struct drm_i915_private *i915 = mem->i915; - struct drm_i915_gem_object *obj; - struct i915_buddy_block *block; - struct scatterlist *sg; - LIST_HEAD(objects); - u64 size; - int err = 0; - - /* - * While we may create very large contiguous blocks, we may need - * to break those down for consumption elsewhere. In particular, - * dma-mapping with scatterlist elements have an implicit limit of - * UINT_MAX on each element. - */ - - size = SZ_8G; - mem = mock_region_create(i915, 0, size, PAGE_SIZE, 0); - if (IS_ERR(mem)) - return PTR_ERR(mem); - - obj = igt_object_create(mem, &objects, size, 0); - if (IS_ERR(obj)) { - err = PTR_ERR(obj); - goto out_put; - } - - size = 0; - list_for_each_entry(block, &obj->mm.blocks, link) { - if (i915_buddy_block_size(&mem->mm, block) > size) - size = i915_buddy_block_size(&mem->mm, block); - } - if (size < max_segment) { - pr_err("%s: Failed to create a huge contiguous block [> %u], largest block %lld\n", - __func__, max_segment, size); - err = -EINVAL; - goto out_close; - } - - for (sg = obj->mm.pages->sgl; sg; sg = sg_next(sg)) { - if (sg->length > max_segment) { - pr_err("%s: Created an oversized scatterlist entry, %u > %u\n", - __func__, sg->length, max_segment); - err = -EINVAL; - goto out_close; - } - } - -out_close: - close_objects(mem, &objects); -out_put: - intel_memory_region_put(mem); - return err; -} - static int igt_gpu_write_dw(struct intel_context *ce, struct i915_vma *vma, u32 dword, @@ -1098,7 +1046,6 @@ int intel_memory_region_mock_selftests(void) SUBTEST(igt_mock_fill), SUBTEST(igt_mock_contiguous), SUBTEST(igt_mock_splintered_region), - SUBTEST(igt_mock_max_segment), }; struct intel_memory_region *mem; struct drm_i915_private *i915; diff --git a/drivers/gpu/drm/i915/selftests/mock_gem_device.c b/drivers/gpu/drm/i915/selftests/mock_gem_device.c index cf40004bc92a..d189c4bd4bef 100644 --- a/drivers/gpu/drm/i915/selftests/mock_gem_device.c +++ b/drivers/gpu/drm/i915/selftests/mock_gem_device.c @@ -32,6 +32,7 @@ #include "gt/intel_gt_requests.h" #include "gt/mock_engine.h" #include "intel_memory_region.h" +#include "intel_region_ttm.h"
#include "mock_request.h" #include "mock_gem_device.h" @@ -70,6 +71,7 @@ static void mock_device_release(struct drm_device *dev) mock_fini_ggtt(&i915->ggtt); destroy_workqueue(i915->wq);
+ intel_region_ttm_device_fini(i915); intel_gt_driver_late_release(&i915->gt); intel_memory_regions_driver_release(i915);
@@ -116,6 +118,7 @@ struct drm_i915_private *mock_gem_device(void) #endif struct drm_i915_private *i915; struct pci_dev *pdev; + int ret;
pdev = kzalloc(sizeof(*pdev), GFP_KERNEL); if (!pdev) @@ -178,6 +181,10 @@ struct drm_i915_private *mock_gem_device(void) atomic_inc(&i915->gt.wakeref.count); /* disable; no hw support */ i915->gt.awake = -ENODEV;
+ ret = intel_region_ttm_device_init(i915); + if (ret) + goto err_ttm; + i915->wq = alloc_ordered_workqueue("mock", 0); if (!i915->wq) goto err_drv; @@ -201,6 +208,7 @@ struct drm_i915_private *mock_gem_device(void) intel_engines_driver_register(i915);
i915->do_release = true; + ida_init(&i915->selftest.mock_region_instances);
return i915;
@@ -209,6 +217,8 @@ struct drm_i915_private *mock_gem_device(void) err_unlock: destroy_workqueue(i915->wq); err_drv: + intel_region_ttm_device_fini(i915); +err_ttm: intel_gt_driver_late_release(&i915->gt); intel_memory_regions_driver_release(i915); drm_mode_config_cleanup(&i915->drm); diff --git a/drivers/gpu/drm/i915/selftests/mock_region.c b/drivers/gpu/drm/i915/selftests/mock_region.c index 5d2d010a1e22..eafc5a04975c 100644 --- a/drivers/gpu/drm/i915/selftests/mock_region.c +++ b/drivers/gpu/drm/i915/selftests/mock_region.c @@ -1,17 +1,56 @@ // SPDX-License-Identifier: MIT /* - * Copyright © 2019 Intel Corporation + * Copyright © 2019-2021 Intel Corporation */
+#include <linux/scatterlist.h> + +#include <drm/ttm/ttm_placement.h> + #include "gem/i915_gem_region.h" #include "intel_memory_region.h" +#include "intel_region_ttm.h"
#include "mock_region.h"
+static void mock_region_put_pages(struct drm_i915_gem_object *obj, + struct sg_table *pages) +{ + intel_region_ttm_node_free(obj->mm.region, obj->mm.st_mm_node); + sg_free_table(pages); + kfree(pages); +} + +static int mock_region_get_pages(struct drm_i915_gem_object *obj) +{ + unsigned int flags; + struct sg_table *pages; + + flags = I915_ALLOC_MIN_PAGE_SIZE; + if (obj->flags & I915_BO_ALLOC_CONTIGUOUS) + flags |= I915_ALLOC_CONTIGUOUS; + + obj->mm.st_mm_node = intel_region_ttm_node_alloc(obj->mm.region, + obj->base.size, + flags); + if (IS_ERR(obj->mm.st_mm_node)) + return PTR_ERR(obj->mm.st_mm_node); + + pages = intel_region_ttm_node_to_st(obj->mm.region, obj->mm.st_mm_node); + if (IS_ERR(pages)) { + intel_region_ttm_node_free(obj->mm.region, obj->mm.st_mm_node); + return PTR_ERR(pages); + } + + __i915_gem_object_set_pages(obj, pages, i915_sg_dma_sizes(pages->sgl)); + + return 0; +} + static const struct drm_i915_gem_object_ops mock_region_obj_ops = { .name = "mock-region", - .get_pages = i915_gem_object_get_pages_buddy, - .put_pages = i915_gem_object_put_pages_buddy, + .get_pages = mock_region_get_pages, + .put_pages = mock_region_put_pages, .release = i915_gem_object_release_memory_region, };
@@ -23,7 +62,7 @@ static int mock_object_init(struct intel_memory_region *mem, static struct lock_class_key lock_class; struct drm_i915_private *i915 = mem->i915;
- if (size > mem->mm.size) + if (size > resource_size(&mem->region)) return -E2BIG;
drm_gem_private_object_init(&i915->drm, &obj->base, size); @@ -38,9 +77,18 @@ static int mock_object_init(struct intel_memory_region *mem, return 0; }
+static void mock_region_fini(struct intel_memory_region *mem) +{ + struct drm_i915_private *i915 = mem->i915; + int instance = mem->instance; + + intel_region_ttm_fini(mem); + ida_free(&i915->selftest.mock_region_instances, instance); +} + static const struct intel_memory_region_ops mock_region_ops = { - .init = intel_memory_region_init_buddy, - .release = intel_memory_region_release_buddy, + .init = intel_region_ttm_init, + .release = mock_region_fini, .init_object = mock_object_init, };
@@ -51,6 +99,14 @@ mock_region_create(struct drm_i915_private *i915, resource_size_t min_page_size, resource_size_t io_start) { + int instance = ida_alloc_max(&i915->selftest.mock_region_instances, + TTM_NUM_MEM_TYPES - TTM_PL_PRIV - 1, + GFP_KERNEL); + + if (instance < 0) + return ERR_PTR(instance); + return intel_memory_region_create(i915, start, size, min_page_size, - io_start, &mock_region_ops); + io_start, INTEL_MEMORY_MOCK, instance, + &mock_region_ops); }